Rear Loop Fabrication

[ShaggyPit]

Being cheap and trying to learn a lot at the same time by hands on experience...

I am wondering what is the best tubing and where to purchase it from to make my own rear loop.

I got the idea of filling it with sand plugging it heating and bending down, just cant seem to find any real solid information on the type of tube. optimum width of walls? Diameter of tube? any help is appreciated!

 

[DesertKZ]

You know, I was going to go this route because I'm cheap as well.... But, after searching ebay and finding one for my bike for $30 that included the inner adapters it was a no-brainer. It would drive me crazy if I didn't get it as precise as a commercial tubing bender could get it.

I have no idea on the tubing, post pics when you get it done!

 

[ShaggyPit]

You know, I was going to go this route because I'm cheap as well.... But, after searching ebay and finding one for my bike for $30 that included the inner adapters it was a no-brainer. It would drive me crazy if I didn't get it as precise as a commercial tubing bender could get it.

I have no idea on the tubing, post pics when you get it done!

that what all signs seem to be pointing to! I have done some search on ebay but cannot seem to find an abundance of loops that would work and if I do find them they have stupid shipping costs and still run about around 60 to 70 bucks. Might just have to man up and order the one from DCC. Few more days of searching the eBay world first however..

Will post pics as my build progresses!

 

[SONICJK]

check my signature

 

[ShaggyPit]

check my signature

awesome thanks! will most likely go with your option! appreciate it a ton!
would have liked to fabricate one myself but for my first build I think im going to take the easy way out on this portion anyways...already purchased some sheet metal for the pan so hopefully I will manage on that aspect! ;D

 

[SONICJK]

There's really no easy way to fab one without a dedicated tube bender.
You can do it manually if you build a jig but then you either need oxy torch to get it hot enough to bend, or use flimsy enough metal that you can bend it by hand (no Bueno)

And no problem man just trying to help out with the tools I've got at my disposal.

 

[GoCrazy]

Check the size of your tubing. Japanese bikes from the '80 used 1 inch tubes. One of the easiest ways you can bend it is to use an old ford fiesta rear hub as a dice. You can also go to any car shop that makes car exhausts, they could bend the pipe for you.

 

[SONICJK]

Yamaha often uses 7/8 tubing. Most all other bikes are 1"
An exhaust shop uses a kink bender, not a mandrel bender. And unless they make exhausts for push mowers, they aren't going to be able to bend a 1" tube.
Not trying to be adversarial, just don't see the point in spreading wrong information.

To the OP:
Your CB750 has a 9" radius. I don't make 9" hoops, but you can cut an 8" hoop and weld in a 1" spacer in the center to get to 9", that's what I do.

 

[J-Rod10]

I made a jig for mine that fit the shape of my seat, hit it with the torch and it bent easily. Then I welded a fender mounot to it.

 

[ShaggyPit]

Yamaha often uses 7/8 tubing. Most all other bikes are 1"
An exhaust shop uses a kink bender, not a mandrel bender. And unless they make exhausts for push mowers, they aren't going to be able to bend a 1" tube.
Not trying to be adversarial, just don't see the point in spreading wrong information.

To the OP:
Your CB750 has a 9" radius. I don't make 9" hoops, but you can cut an 8" hoop and weld in a 1" spacer in the center to get to 9", that's what I do.

if I order a hoop of yours, would you also mail the one inch pience with the order? also, is a slug required to wed in the one inch piece?